the north korea the regime doesn't want seen. >> if people stop believing in the regime, that means central control is breaking down. >> narrator: with undercover footage and exclusive interviewfrontline uncovers a new generation risking their lives to smuggle information in and out. >> any kind of uprising will probably fail, and all your relatives will be sent to prison camps. >> narrator: inside "the secret state of north korea." >> go to pbs.org/frontline for exclusive video excerpts of steven cohen being questioned about insider trading. >> you would have to explain it to me. >> when does a hot tip become insider information? judge for yourself in our interactive quiz. read extended interviews with turney duff, preet bharara and others. and connect to tfrontline community. sign up for our newsletter, and follow us on facebook, twitter and pbs.org/frontline. >> frontline is made possible by contributions to your pbs station from: and by the corporation for public broadcasting. major support for frontline is provided by the john d. and catherine t. macarthur foundation. committed to buil